Piston construction



24, was.

H. GARVIN- PISTON CONSTRUCTION Filed Sept 11, 1935 vided with a curvedPatented Mar. 24, 1936 UNITED STATES ATENT OFFIE 3 Claims.

This invention relates to piston construction, the primary object of theinvention being to provide a piston having an adjustable skirt, andmeans for expanding the skirt into engagement with the cylinder wall inwhich the piston operates, thereby compensating for wear directed to thepiston, and insuring a noiseless piston at all times.

Another object of the invention is to provide an expansible piston whichmay be expanded to accurately fit within its cylinder wall, therebyinsuring the eificiency of the piston, and eliminating the necessity ofreplacing worn pistons.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts hereinafter more fully describedand pointed out in the claims, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawing- Figure 1 is a longitudinal sectional viewthrough a piston constructed in accordance with the invention.

Figure 2 is a sectional view taken on line 22 of Figure 1.

Figure 3 is a bottom the bolts at one side of in section.

Figure 4 is a sectional view taken on line 4-4 of Figure 1.

Figure 5 is a sectional view taken on line 5-5 of Figure 3.

Referring to the drawing in detail, the reference character 5 designatesthe head of a piston, which is formed with extensions 6 to which bars 1are secured, the bars 1 being curved to conform to the curvature of theinner surface of the piston.

The reference character 8 designates a sectional piston skirt, eachsection of the skirt being proplate 9 formed with elongated openings I0, through which the securing bolts H extend, the securing boltsoperating in these openings, to permit the skirt sections to be expandedto compensate for wear. Nuts I 2 are mounted on the ends of the securingbolts and secure the skirt sections in their positions of adjustment.

Plates I3 cooperate with the curved plates 9 plan view of the piston,the piston being shown panded. 10

After the bolts have been operated to'move the plates as described, thenuts [6 carried by the bolts l4, are tightened, thereby securing theskirt sections in their positions of adjustment.

From the foregoing it will be obvious that when 15 the skirt of thepiston becomes worn to cause the piston to rock within its cylinder, theskirt of the piston may be expanded and moved into close engagement withthe cylinder wall thereby compensating for wear and insuring a close fitbetween the cylinder and piston eliminating what is commonly known aspiston slap.

Having thus described the invention, what is claimed is:

1. A piston comprising a body portion, a sectional expansible skirtforming a part of the body portion, a curved plate secured to each skirtsection, a bolt disposed between the adjacent ends of the plate, pins onthe bolts and adapted to engage the ends of the plates whereby the sec-30 tions of the skirt are moved outwardly, and

means securing the skirt sections in their positions of adjustment.

2. A piston comprising a head, expansible skirt sections mounted on thehead, curved plates car- 3 ried by the skirt sections, bolts disposedbetween the adjacent ends of the plates, adjusting means on the boltsand engaging the adjacent ends of the plates for moving the adjacentends of the plates away from each other, expanding the skirt sections,and means securing the skirt sections in their positions of adjustment.

3. A piston comprising a body portion, a sectional expansible skirtforming a part of the body portion, plates formed integral with theskirt sections and extending outwardly therefrom, bolts securing theskirt to the body portion, adjusting bolts, and means on the adjustingbolts for moving the plates expanding the sleeve, when the ad- 5 justingbolts are rotated.

HERMAN GARVIN.

engage 5

